Help: Label & constant

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xRom

Joined: 26 Apr 2011
Posts: 13

xRom 26 Apr 2011, 19:20

Please,anybody, how to do this:
a = 1 ;generate label name
@1:

a = a + 1 ;generate next label name
@2:

a = a + 1 ;...next
@3:

etc...?

26 Apr 2011, 19:20

Overflowz

Joined: 03 Sep 2010
Posts: 1044

Overflowz 26 Apr 2011, 19:23

you mean something like this ?

Code:

.data
a dd ?
.code
mov [a],1
@1:
inc [a]
@2:
inc [a]
@3:
....

26 Apr 2011, 19:23

xRom

Joined: 26 Apr 2011
Posts: 13

xRom 26 Apr 2011, 19:55

Overflowz wrote:

you mean something like this ?
....

No, I mean two macros "for" and "next" for example:

Code:

macro for p1,p2,p3 {
for_count = for_count + 1
for_nested = for_nested + 1
     if cond==false then jmp @for_exit
@for(for_count*1000+for_nested):
}

macro next  {
if cond==true then jmp @for
@for_exit(for_count*1000+for_nested):
for_nested = for_nested - 1 
}
   for i,1,2
       for j,1,100       ;nested for

       next
   next

26 Apr 2011, 19:55

Overflowz

Joined: 03 Sep 2010
Posts: 1044

Overflowz 26 Apr 2011, 20:22

Ohh, sorry I don't know macro language here.. Smile

26 Apr 2011, 20:22

xRom

Joined: 26 Apr 2011
Posts: 13

xRom 26 Apr 2011, 20:52

Overflowz wrote:

Ohh, sorry I don't know macro language here..

And you need this? When I'll deal can put it here Embarassed

26 Apr 2011, 20:52

Overflowz

Joined: 03 Sep 2010
Posts: 1044

Overflowz 26 Apr 2011, 23:11

xRom
Hehe, I don't like macro things Razz

I prefer hard way and I don't know why )) Thanks anyway Smile

26 Apr 2011, 23:11

JohnFound

Joined: 16 Jun 2003
Posts: 3499
Location: Bulgaria

JohnFound 27 Apr 2011, 06:50

Creating loops this way is not a good idea for assembly language, because the code generated will be far from optimal and, worse, will prevent you from seeing better solutions.
If you really want to use loops this way - simply use Pascal or other HLL of choice. Smile

27 Apr 2011, 06:50

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4623
Location: Argentina

LocoDelAssembly 27 Apr 2011, 20:17

I don't understand much what are you trying to do, but to answer your first message maybe this helps:

Code:

N equ 1

macro defLabel
{
  match n, N\{
    label\#n:
  \}

  rept 1 n:N+1\{N equ n\}
}


defLabel
defLabel

; Just to check the labels are defined:
jmp label1
jmp label2

27 Apr 2011, 20:17

typedef

Joined: 25 Jul 2010
Posts: 2893
Location: 0x77760000

typedef 27 Apr 2011, 21:43

He want's to generate the next label to be jumped at, given the current label he's at.

For example

label_1:

add size of opcodes that go in between and where they end is where the next label begins

label_1:
MOV EAX,2

So....
sizeof ( MOV EAX,2 ) + label_1 = label_2

I think that is what he want's to do. But I don't know why do that if you can just mark the labels..... Rolling Eyes

27 Apr 2011, 21:43

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